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Efficient three-step entanglement concentration for an arbitrary four-photon cluster state |
| Si Bin (司斌)a, Su Shi-Lei (苏石磊)a, Sun Li-Li (孙立莉)b, Cheng Liu-Yong (程留永)b, Wang Hong-Fu (王洪福)a c, Zhang Shou (张寿)a |
a Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
b Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
c School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China |
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Abstract We propose an entanglement concentration protocol (ECP) to concentrate an arbitrary partially-entangled four-photon cluster state. As a pioneering three-step entanglement concentration scheme, our protocol only needs single-photon resource to assist the concentration in each step, which makes this protocol more economical. With the help of the linear optical elements and weak cross-Kerr nonlinearity, one can obtain a maximally-entangled cluster state via local operations and classical communication. Moreover, the protocol can be iterated to obtain a higher success probability and is feasible under the current experimental conditions.
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Received: 09 April 2012
Revised: 28 September 2012
Accepted manuscript online:
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PACS:
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.67.Hk
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(Quantum communication)
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42.50.-p
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(Quantum optics)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61068001 and 11264042), the Talent Program of Yanbian University, China (Grant No. 950010001), the National Science Foundation for Post-doctoral Scientists of China (Grant No. 2012M520612), and the Program for Chun Miao Excellent Talents of Department of Education of Jilin Province, China (Grant No. 201316). |
Corresponding Authors:
Zhang Shou
E-mail: szhang@ybu.edu.cn
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Cite this article:
Si Bin (司斌), Su Shi-Lei (苏石磊), Sun Li-Li (孙立莉), Cheng Liu-Yong (程留永), Wang Hong-Fu (王洪福), Zhang Shou (张寿) Efficient three-step entanglement concentration for an arbitrary four-photon cluster state 2013 Chin. Phys. B 22 030305
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